from my life experience- i have observed 2 kind of people(very generalized)-the ones that are having creative mind and ones that can get the job done. there is a very rare group that can do both. and very tiny fraction of it are the traders\programmers\system traders. to OP-if you don't know where to look and you have no idea what do you want from your observations or you can't come up with any idea at all-i'm not sure if you need to go any further.
you can find the 'general hints and tips' here, but if after a while you can't come up any idea-leave it alone. move on. i have exact opposite mind- i can come up with 10 new trading ideas each and every day and probably at least another 10-20 'regular ones' based on my every day observations.
i mean-just some random s*** keeps popping up in my head. from design ideas to a algo for a score calculations in a video games(my son is keeps laughing at me),cause one that i was keep talking about with my family members 15 years ago been aborted by major software company just few years ago and it's their 'main feature'...